Book excerpt: Step into a chaotic, impoverished and drug-fueled world of fear and desperation -- the 14-day road trip of Mark Tucker, a peaceable heroin addict who finds himself caught up in a murderous crime spree and can't figure out how to escape his homicidal captor. At first, Tucker was lauded by crime-fighters as a hero for helping bring down his captor, James ("Juan") T. Moran, America's eighth most-wanted man, and believed himself eligible for a $100,000 reward. Then, overnight, he was recast as a co-defendant for rendering assistance in a double homicide. He served five years and paid a fine of $70,000. Now he's clean, sober, and eager to show the world that addicts can and do recover. This is his story.